Vacuum cleaner filter bag



April 29, 1969 QQRDELL 3,440,805 I VACUUM CLEANER FILTER BAG Filed June 50, 1967 INVENTOR. F/ 4 W/wr/A/ (oz/2.5a

. v BY Yr United States Patent O 3,440,805 VACUUM CLEANER FILTER BAG Martin Cordell, Far Rockaway, N.Y., assignor to Studley Paper Company, Inc., Far Rockaway, N.Y., a corporation of New York Filed June 30, 1967, Ser. No. 650,498 Int. Cl. Bold 29/14, 29/42; B65d 33/00 US. Cl. 55-368 1 3 Claims ABSTRACT OF THE DISCLOSURE A vacuum cleaner filter bag provided with a collar mounted thereto in registry with the intake port of the bag, said vacuum cleaner filter bag provided with an inner bag collar in the form of a tubular member mounted in overlapping relationship with the collar and extending down into the bag interior itself and held firmly to the bag body and collar by an exteriorly disposed projecting resilient member.

BACKGROUND OF THE INVENTION Field of the invention This invention relates to a vacuum cleaner filter bag and more particularly to one provided with an inner bag collar member in the form of a tubular member extending into the bag body. More especially this invention relates to a vacuum cleaner filter bag provided with such an inner bag collar wherein the inner bag collar is mounted against an exteriorly positioned collar and the bag itself.

Discussion of the prior art The utilization in vacuum cleaner filter bags of exteriorly mounted or disposed bag collars is generally well known. These collars are generally made of a substance far more rigid and durable than the air pervious paper of the bag body itself. Generally, they are made of cardboard or other composition paper. It has also been suggested to employ tubular members which extend from the intake orifice of the bag and the surrounding bag collar into the interior of the vacuum cleaner filter bag itself. The use of these tubular members, while desirable, has been limited due to problems in assembling the finished bag. Generally, the tubular member had to be glued or stapled around the intake orifice either on the edges of the collar facing the intake orifice or onto the paper bag itself. In both instances this was a costly and time consuming operation with only limited success as far as quality bag manufacture was concerned.

It therefore became very desirable to provide a vacuum cleaner filter bag which was equipped with the tubular member but which could be assembled very readily without disturbing the bag interior and without resorting to messy cumbersome, expensive and time consuming gluing or stabling operations.

OBJECTS OF THE INVENTION It is an object of this invention, therefore, to provide a vacuum cleaner filter bag provided with a tubular member extending into the interior of the bag itself which is readily assembled.

It is another object of this invention to provide such a bag wherein it is assembled without using glue, adhesives or staples.

These and other objects and advantages will become apparent from the following description, appended claims, and accompanying drawings.

Patented Apr. 29, 1969 This invention is an improvement in a vacuum cleaner filter bag which comprises a bag body constructed of an air pervious material and defining an inlet orifice in the bag body and an exteriorly disposed vacuum cleaner filter bag collar having an orifice therein positioned on the bag body so that the orifices are in registry. The improvement resides in provision for an inner bag collar in the form of a generally tubular member extending into the bag and provided with peripherally running flanges disposed exteriorly of the bag overlapping the exteriorly disposed collar and bearing thereagainst, the inner bag collar provided with an interiorly disposed peripherally running rim positioned in abutting relationship against the bag and bearing against the bag directly and against the exteriorly disposed collar indirectly whereby the inner bag collar is locked in position about said exteriorly disposed collar.

BRIEF DESCRIPTION OF DRAWINGS The invention can be more readily understood and appreciated when reference is made to the accompanying drawings, in which:

FIGURE 1 is an explodedperspective view of a vacuum cleaner filter bag provided with an inner bag collar. The figure is partially broken away;

FIGURE 2 is a sectional view taken along the line 2-2 of FIGURE 1;

FIGURE 3 is a sectional view taken along the line 33 of FIGURE 1; and

FIGURE 4 is a view similar to FIGURE 3 of another embodiment of the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS Preferred embodiments of my invention are illustrated in the accompanying drawings in which the entire bag with its inner bag collar is represented by reference numeral 2. The bag body 4 of the vacuum cleaner filter bag is constructed of air permeable filter paper. The bag is formed into a flat top section by adhesively securing paper panels 6, 8, 10 and 12 together. These panels are so formed as to define an intake orifice 18 on the top of the bag. To the paper top of the bag there is secured adhesively a cardboard exterior bag collar 20 provided with an opening. This opening is placed in registry with orifice 18 when the collar is mounted against the paper bag. An inner bag collar 51 provided with a tubular portion 30 which tapers from point 34 to end 36 at which point it has a thickness of .002 inch is positioned in the interior of the bag itself and held firmly against collar 20 due to overlapping flange pieces 40, 42, 44 and 46. The inner bag collar is in the form of a continuous unitary tubular member of polyethylene which, for the tubular portion, has been vacuum formed and drawn so that it tapers in thickness to .002 inch at lower extremity 36. This can be seen by the exaggerated walls 52 and 56 in FIGURE 2. The other walls of inner bag collar 20 are walls 54 and 58. Positioned beneath but close to flanges 40, 42, 44 and 46 on inner bag collar 20 is a continuous exteriorly running rim or projection 60, which encircles the inner bag collar 20. Its distance from flanges 40, 42, 44 and 46 is determined by the thickness of exteriorly mounted collar 20 and the thickness of the paper top of the bag itself as shown in FIGURE 3. Due to the positioning of flanges 40, 42, 44 and 46 and rim 60 therebeneath the inner bag collar 51 is locked rigidly in place at the top of the bag. Due to the decreasing thickness of the tubular portion 30 from point 34 to point 36, the tubular portion is readily movable within the bag body itself without causing movement of the upper portion of the inner bag collar 51 near rim 60 and flanges 40, 42, 44 and 46. This is insured due to the fact that the inner bag collar 51 is constructed of relatively firm polyethylene from the flanges to about point 34, just beneath rim 60.

The vacuum cleaner filter bag thus provided with the inner bag collar 51 having the critical decreasing thickness is capable of containing more dust, dirt or other debris in the bag. This is due to the fact that the action of the vacuum cleaner causes the inner bag collar 51 to oscillate back and forth within the bag in response to the negative pressures imposed. The oscillating bag moves arcuately back and forth across the length of the bag. This distributes the dirt evenly within the paper bag body. Additionally, the bag tends to be distended and expanded greater by virtue of the inner bag collar oscillating and vibrating within the bag body, thereby directing incoming air about the interior of the bag.

It should be noted that the inner bag collar 51 can be assembled readily during a bag making operation simply by placing a preformed inner bag collar 51 within orifice 18 with the flanges 40, 42, 44 and 46 positioned over exteriorly disposed collar 20 and forcing the inner bag collar 51 into the bag body so that rim 60 is locked beneath the paper bag panels 8 and 10 and exteriorly disposed collar 20. This is done employing an ordinary mandrel 80 as shown in FIGURE 3 having an upper block portion 82 and lower tubular portion 84. The mandrel moves in the direction of arrows 86 as shown in FIGURE 3. The insertion of the inner bag collar 51 into the bag itself can be done without fully distending the bag body itself. Thus, it is a substantial improvement over operations involving use of adhesives or staples which require complicated manufacturing techniques which increase greatly the time involved in the assembly of a single bag with the inner bag collar. The use of an inner bag collar provided with an upper rigid portion between the flanges and a rim member as shown and described does not require additional parts or materials to accommodate the inner bag body. Other advantages of the invention will be apparent to one skilled in the art.

FIGURE 4 shows an embodiment of the invention in which the tubular portion of the inner bag collar is eliminated substantially. This embodiment is useful for channeling the dirt away from the adhesively secured paper bag panels 6, 8, 10 and 12, thus insuring that any incoming dust or dirt does not impinge against the adhesive seals at the top of the bag and cause a rupture of the seal at a weak point in the seal. Such a rupture could drastically impair the overall efliciency of the vacuuming operation itself.

I claim:

1. A vacuum cleaner filter bag comprising a bag body constructed of an air pervious material and defining an inlet orifice in the bag body, an exteriorly disposed vacuum cleaner filter bag collar having an orifice therein positioned on said bag body so that the orifices are in registry, the improvement which comprises an inner bag collar in the form of a generally tubular member extending into said bag and provided with peripherally running fianges disposed exteriorly of said bag overlapping said exteriorly disposed vacuum cleaner filter bag collar and bearing thereagainst, said inner bag collar of said bag provided with an interiorly disposed peripherally running rim positioned in abutting relationship against said bag and bearing against said bag directly and against said exteriorly disposed collar indirectly, said inner bag collar being locked in posiion about said exteriorly disposed collar and the inlet orifice portion of the bag.

2. An improvement according to claim 1, wherein said tubular member is firm from said flanges to said rim and decreases in thickness from beneath said rim to its lowest extremity.

3. An improvement according to claim 2, wherein said tubular member is constructed of a vacuum formed and drawn polyethylene.

References Cited UNITED STATES PATENTS 2,808,898 10/1957 Meyerhoeter 376 2,945,558 7/1960 Cordell 55376 3,088,260 5/1963 Seyfried 55-374 3,191,365 7/1965 Feeley 55-369 FOREIGN PATENTS 754,025 8/1956 Great Britain. 879,108 10/1961 Great Britain.

HARRY B. THORNTON, Primary Examiner. BERNARD NOZICK, Assistant Examiner.

US. Cl. X.R. 

